Perfboard Circuit Assembly Inside Simulator Cabinet, San Francisco State College (Updated two months ago)

You can view this bundle in the SFSU Over the Years collection area.

A larger electronic circuit assembled on a perforated prototyping board (perfboard) is mounted within a simulator cabinet. The wiring and components suggest integration into a broader analog computing or control system, illustrating how discrete circuits were incorporated into complex experimental setups.

Tags: historic technology

Added to SFSU Over the Years on July 31, 2026.

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Information

  • Identifier: TP-ATA-1897
  • Context: <p><strong data-start="408" data-end="459">Function: Signal Conditioning / Logic Interface</strong></p> <p data-start="460" data-end="585">This board is likely part of a <strong data-start="491" data-end="515">supporting subsystem</strong> inside the Lunar Landing Simulator or Control System.&nbsp;</p> <ul> <li data-start="587" data-end="675"> <p data-start="589" data-end="675">Discrete transistors and resistors are visible, wired in a compact analog circuit.</p> </li> <li data-start="676" data-end="843"> <p data-start="678" data-end="739">The connections and layout suggest it may have been used for:</p> <ul data-start="742" data-end="843"> <li data-start="742" data-end="768"> <p data-start="744" data-end="768"><strong data-start="744" data-end="768">Signal amplification</strong></p> </li> <li data-start="771" data-end="798"> <p data-start="773" data-end="798"><strong data-start="773" data-end="798">Trigger pulse shaping</strong></p> </li> <li data-start="801" data-end="843"> <p data-start="803" data-end="843"><strong data-start="803" data-end="843">Analog switching or comparator logic</strong></p> </li> </ul> </li> <li data-start="844" data-end="1011"> <p data-start="846" data-end="1011">The wiring at the bottom connects to <strong data-start="883" data-end="903">external systems</strong>, indicating this board acts as a <strong data-start="937" data-end="947">bridge</strong> between sensors/switches and the core analog simulator modules.</p> </li> <li data-start="844" data-end="1011">It can be thought of as&nbsp;a &ldquo;middleware&rdquo; circuit&mdash;handling the logic or smoothing out the voltage before sending data to or from the simulator&rsquo;s core.</li> </ul> <p>&nbsp;</p> <div> <p><strong>Credits:</strong>&nbsp;</p> <p>Some technical descriptions and historical interpretations were developed with the assistance of ChatGPT, an AI language model by OpenAI.</p> </div>
  • Geographic Coverage: San Francisco, CA
  • Type: Still Image
  • Format: Negative
  • Source: San Francisco State University Archives
  • Rights: Public

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